A brother who works overtime and misses the last train comes to stay at his sister's house near his office. At first, his sister watches him work at his sister's house in amazement, but he starts drinking beer and falls asleep before he knows it. He is aroused by the sight of his sister sleeping with her panties completely exposed, and while he sniffs her gently so as not to wake her up, he takes out his dick and starts masturbating. As he strokes it near his sister's face, his sister wakes up and jumps up in surprise. However, his kind sister, who can't hate her brother, says she will help him until he shoots his erection, and takes out her breasts and starts jerking him off. The brother doesn't cum easily. Gradually escalating, they give him a blowjob, and then they do 69, and his sister also feels good and cums. Finally, she suggests a bare thighjob, saying that since they are brother and sister, they can't insert it, but it's okay if they just rub it. Even if they insert it while their pussy and dick are rubbing directly, they both feel too good to stop!